Treadle



April 14, 1942;

D. H. CHASON SIREADLE Filed Dec. 26, 1940 2 Sheets-Sheet 1 gwuwlm .Daniel H Chaaon April 14, 1942. v D. H. cHAsoN f .2,279,587

TREADLE Filed Dec. 26, 1940 2 Sheets-Sheet 2 l DanielHChason @mma Patented Apr. 14, 1942 2,279,587 "rREADLE Daniel H. Chason, Elizabeth, N. J., assigner to The Singer Manufacturing Company, Elizabeth, N. J., a corporation of'New Jersey Application December 26, 1940, Serial No. 371,706

17 Claims.

...This invention relates to treadles and more particularly to that type of treadle used with sewing machines and the like equipment. The present .invention may be used on a foot-powered machine in which case the treadle may be con nected to a belt-wheel by the usual pitman-rod or'it may be us'ed on a power-driven machine and function as a foot-control treadle for the power source. l

vThe primary object of this invention is` the provision of an inexpensive sheet-metal treadle which, 'although made of light materials, is strong and rigid and will not warp under the stresses of use.

I'Another object of the invention is to provide a vtread-le of such design that it may be adapted to the various types of commercial and family sewing machines now in use. y

The invention, both in structure and in operation, as well as additional objects thereof, Will be best understood from the following description` taken in conjunction with the accompanying drawings in which:

@Fig-'1 is a front elevation of a machine stand upon which a sewing machine is mountedl and to' which one form of my invention is applied.

Fig. 2 is a bottom perspective view of the preferred form of the treadle.'

Fig. 3 is a fragmentary section of the treadle taken substantially along line A--A of Fig. 1.

4"Fig, 4 is an enlarged fragmentary bottom plan View of a portion of the treadle shown in Fig. 2. f Figy is a longitudinal section of a modified form of treadle. l

Y' Fig'. 6 is anenlarged fragmentary bottom plan View' similar to Fig. 4 but showing another modieii form ofl treadle. l

:Fig `7 is a longitudinal section showing a further modiiied form of treadle.

"Fig, 8 is a' fragmentary section of the forward edge portion of the treadle taken substantially along line A-A of Fig. 1.

Referring more specifically to the drawings, the invention is disclosed in connection With a sewing machine l mounted upon the machine stand 2 which is secured upon legs 3. Suitably strungy between the legs 3 is .a rod or tube 4 upon which the treadle 5 is rockably mounted. The treadle 5 in Fig. 1 is shown as connected to an electric under-driver or power-transmitter 6 by means of a hooked rod I which connects with the clutch-controlling arm 1a thereof. A power device .of this type is represented in U. S. Patent No.V 2,048,501, dated July 21, 1936. v

broken rectangular sheet-metal platform 8 havey ing a downturned marginal flange 9, compris-` ing the end portions 9a and 9b, the front portion 9c and the rear kportion 9d, extending thereabout, thus forming an inverted pan-like: ele,- ment. Two crossed truss-bars I0 "extend di'. agonally across the bottom of the platform; l;

and are spot-Welded, or otherwise fixed, toA the four corners I l of the platform 8. As shownmost` Each form of the invention comprisesan un-"W clearly in Figs. 5 and 7, the truss-bars l0 are bowed downwardly from the platform 8 `and Athey are spot-welded together, or otherwise secured,v

at their common junction point I2.

AThe. provision of the peripheral ange 9 and, tlietruss-bars It lends great strength and rigidity, to .the treadle,ythus `preventing warpingl and twisting thereof vunder the stresses of use, While permitting the treadle to be constructed oi:rela: v

tively light-weight material.

As best shown. in Figs.'1 andB, the forward.. top edge of the treadle is provided With abead portion 3a extending vslightly above the level o1' une platform 8 and formed in the platform ma-` teri'al; The bead extends only along the frontf' edge of the treadle and itis coextensive with the I'iange portion Sic.-v Provsion of the bead-isi'or une purposeoi preventing the op'erators 'footifromv slipping ori'v the treadle platform 8.

' 'un the rear edge `portion of the platform 8 'anextension arm lis adiustably secured vtof-the* nange portion ed by means ofa bolt llll vand 'nut 3i, as best shown inFig. 3. The bolt Ili'extenldsthrough one of the elongated apertures l5 and an aperture provided in the rlange portion ,SaixjThis narige portion ed is formed with an inturnedextension iiiwhich, with the' portion 9d, providesa` sea't'ior the extension arm '13. The free endl` or the arm I3 is providedwith an aperture'll" by means :of which thejhook portion V|8` ofthe..4

rod l is secured thereto'.

In the embodiment of the invention illustrated. in Figs.` lto 4, inclusive, the'endflanges Ela'andv 9b of the platform 8 are provided with oppositely alignedV apertures 1 9 adapted to receive thel rod' or tube d upon which the treadle `is rockably' supported.I A bearing ring ..20 is secured,.preferably -by Welding, tothe inner side of the end viiange` 9a coaxially with one of thefapertures Il!l in order lto provide a broader bearing surface for tubeA. Securediin a like manner to the oppositel end ange Sois a vbearing ring 2l -provided with .an inverted'- U-shaped extension 22. A' split orstrapf y like thrust-collar 23.is secured to the tube 4 be- 1 tween the bearing ring y2| and the extension --22 end portions 9a and .db of the flange have bearing rings 20 secured, preferably by welding, co-

axially with both apertures IB. A thrust collar 23 is made fast'to thetube 4 adjacent to the outer face of each of the end portions 9a and 9b ofthe flange, and thus no relative movement is permitted between the treadle 5 and the tube 4," lengthwise of the latter. I

Fig. 6 illustrates another modified form of my invention. In this 4form the general structure of the treadle is like that of the'preferred form' with the exceptionthat different bearing surshown in Figs. 2, 4 and 5, the portions 25 ofthe flange elements 9a and. 9b surrounding the two apertures i9 are turned inward toprovide bearing/surfacesupon which `the treadle 5 is sup.- ported. Abracket 26 is fixed, preferably by welding, to the inner side of flange portion 9b ad-Y jacent the'faperture 1S. Secured to the tube 4 between' the offset portion of the bracketZB and thel inturned flange. portion 25 .is a split strap thrust-collar 23.4 As in the forms hereinabove describedcollar 23 permits no relative movement between `thertreadle5 and the tube 4, lengthwise of the latter. Y

l A further modication of my invention is illustrated in Fig. '7Y andagain the platform construction is 4like that of the preferred form of my invention. In this form -theplatform 8 is pro.

k vided with apertures I9 in Vwhichcup-shaped trunnions 21 are mounted. These trunnions 21 are formed with circular flanges 28 which are secured,.preferably by welding, tothe inner face portions vof the marginal flange elements 9a and 9b. The .outboard portions of Ithe trunnions 21 are. adapted to be rockably supported in two iioor4 Having thus setrforth the nature of the 4invention, what I claim herein is:

1. A sheet-metal treadle'l having a substantiallyy at platform, a downturned marginal flange extending thereabo'ut, and crossed truss-bars extending diag'onally across the bottom of said platform and being secured to the under side thereof.

A2."A sheet-metal treadle comprising an un-` broken, substantially nat platform having a downturned marginal flange extending there-v about',- and crossed truss-bars extending diagonally across the bottom of said platform, said truss-bars beingY secured to said platform near their ends and being spaced from the bottom of said platform intermediateV their ends.,

`r3.A sheet-metal treadlehaving a 'substantially flat platform, a downturned marginal flange extendingthereabout, and crosse'dtrussbars `extending diagonally across the bottom of said'platform, said truss-bars being secured to said platform .near their ends and bowed away fromsaid platformintermediate their ends and secured together at their point of crossing. v 14. yA sheet-metal treadle comprising'a substantially nat unbroken platform having a downturned marginal flange extending thereabout,

the rear portion of said platform having an inturned edge section extending from said downa turned marginal flange, crossed truss-bars extending diagonally across the bottom of said platform, and an extension arm adjustably secured to said rear portion of said platform;

5. A sheet-metal treadle comprising a substantially nat platform having a downturned marginal flange extending thereabout, crossed truss- 'bars extending diagonally across the bottom of `said platform and secured thereto, and pivotal means to support said platform.

Lf5. A sheet-metal treadle having a substantially flat platform, a downturned marginal flange extending thereabout, crossed truss-bars extending diagonally across the bottom of said platform. and being secured thereto near the ends thereof and secured together at their point of crossing, said truss-bars being bowed away'from said platform intermediate their ends, and pivotal means to support said platform, said means having an axis located between the bottom of said. platform and the bowed portions of said crossed truss-bars.

7. A sheet-metal treadle comprising a substantially.,A flat platform having a downturned marginal flange extending thereabout, crossed trussbars extending diagonally across the bottom of said platform, said truss-bars being secured to said platform near the ends thereof and bowed away therefrom intermediate their ends, and pivotal means including bearing elements carried 1 by said downturned flange to support saidplatform, the axis of saidlsupporting means being located between said platform and the bowed portions of said truss-bars.

.A 8. Asheet-metal treadle comprising a substantiallyflat rectangular platform vhaving a dependingange extending about its `marginal portion, said depending flange having aligned and oppositely disposed apertures, two crossed trussbars extending diagonally across the bottom of said platform and connecting the corners thereof, yand-pivotal supporting means mounted in said oppositely aligned apertures.

9. A sheet-metal treadle comprising a substantially at rectangular platform having a depending fiange extending about its marginal portion,isaid flange being provided with aligned and oppositely disposed apertures, two crossed truss-bars extending diagonally across the` bottom of said platform and connecting the corners "t thereof, said bars being secured to said platform near their-ends and bowed away therefrom intermediate their ends, and pivotal means to support said platform, said means being adapted to be mounted in said aligned apertures so that o? the pivotal axis of said treadle is located between the bottom of said platform and the bowed portion of said crossed truss-bars.

10. A sheet-metal treadle having a substan- `tially. flat platform, a downturned marginal flange,4 extending thereabout, said ange being provided with voppositely disposed and aligned apertures, crossed truss-bars extending diagonally lacross-.the under side of said platform, and means including a supporting bar pivotally `mounted in said yaligned apertures to support saidplatform. u

ll..A sheet-metal treadle comprising a -substantially fiat platform, `a downturned marginal flange extending thereabout and having aligned 75"-"Sapertures in its-end portions, crossed truss-bars extending across the bottom of said platform, and pivotal means including a supporting bar and bearing elements to support said platform, said bearing elements being mounted on said flange concentrically with said apertures and said bar being journaled in said apertures and bearing elements.

12. A sheet-metal treadle comprising a substantially flat platform and a downturned marginal flange extending thereabout, said flange being provided with aligned apertures, crossed truss-bars extending diagonally across the bottom of said platform and being secured thereto near their ends and bowed away therefrom intermediate their ends, pivotal means including a supporting bar and bearing elements to support said platform, said bearing elements being mounted on said downturned flange concentrically with said apertures, said bar being journaled in said apertures and bearing elements, and means to prevent relative axial movement between said treadle and said tube comprising a thrust-collar xed to said bar adjacent to at least one bearing element.

13. A treadle having a substantially flat rectangular platform and a downturned marginal ange extending thereabout, said marginal flange being provided with aligned apertures in the end portions thereof, -crossed truss-bars extending diagonally across the bottom of said platform and being secured thereto near their ends and secured together at their -crossing point, said aligned apertures in the end portions thereof, Y

the portions of the marginal flange which dene said apertures being formed out of the planes of said flange and adapted to function as bearbars being bowed away from said platform intermediate their ends, pivotal means including a supporting bar and ring bearings to support said platform, said ring bearings being mounted on said downturned flange concentrically with said apertures and said supporting bar being journaled in said apertures and ring bearings with its longitudinal axis located between the bottom of the platform and the bowed portion of the truss-bars, and means to prevent relative axial movement between said treadle and said bar comprising a thrust-collar fixed to said bar adjacent to one ring bearing, and an extension fixed to one ring bearing and adapted to lock said collar in place against said ring bearing.

14. A sheet-metal treadle comprising a substantially at platform, a downturned marginal flange extending thereabout, said marginal flange being provided with aligned apertures, the portions of the marginal flange which define said apertures being formed out of the planes of said ange portions and adapted to function as bearing surfaces, crossed truss-bars extending diagonally across the bottom of said platform, and pivotal means to support said platform including a supporting barvjournaled in said aligned apertures and extending between said platform and crossed truss-bars.

ing surfaces, crossed truss-bars extending diagonally across the bottom of said platform, said bars being secured to said platform near their ends and together at their crossing point and being bowed away from said platform intermediate their ends, pivotal means including a supporting bar to support said platform journaled in said apertures with its longitudinal axis located between the bottom of said platform and the bowed portion of said truss-bars, means includ'- ing a thrust-collar fixed to said bar adjacent to one bearing surface to prevent lengthwise movement between said treadle and said bar, and an arm fixed to said marginal flange and adapted to hold said collar in place against said bearing surface.

16. A sheet-metal treadle having a substantially iiat rectangular platform, a downturned marginal iiange extending thereabout, crossed,

truss-bars extending diagonally across the bottom of said platform, said bars being secured to said platform near their ends and secured together at their crossing point, said bars being bowed away from said platform intermediate their ends, and means including bearing trunnions upon which said platform is pivotally mounted, said trunnions being mounted upon the opposite end portions of said marginal flange.

17. A sheet-metal treadle having a substantially fiatA platform, a downturned marginal flange extending thereabout and provided with aligned and oppositely disposed apertures in the end portions thereof, crossed truss-bars extending diagonally across the bottom of said platform, said bars being secured to said platform near their ends and together at their crossing point and being bowed away from said platform intermef diate their ends, and means including bearing trunnions and oor brackets upon which said platform is pivotally mounted, said bearing trunnions being cylindrical in form and provided with circular anges, said trunnions being mounted within said marginal ange apertures with their circular anges secured to said marginal flanges, said trunnions adapted to be journaled within said floor brackets with their common longitu- 'A dinal axis located between the bottom of said platform and the bowed portion of said trussbars.

- DANIEL' H. CHASON. 

